. >> police say the boy's kidnapper 65-year-old jimmy lee dykes is dead. details are still unclear as law officials begin what they say say thorough and labor intensive investigation. nbc's kurt gregory has more. >> reporter: released in the small community of midland city, alabama, following the dramatic rescue of a 5-year-old held captive for seven days in an underground bunker. wait that a tightly knit community had been anxious to hear. >> at approximately 3:12 this afternoon, fbi agents safely recovered the child who's been held hostage for nearly a week. >> reporter: police say the boy has been held captive by 65-year-old jimmy lee dykes after dykes boarded a school bus last week, shot and killed the bus driver. fbi said negotiations with dykes deteriorated within the last 24 hours and that dykes was observed holding a gun. >> at this point, fbi agents fearing the child was in imminent danger, entered the bunker and rescued the child. >> reporter: nbc news has learned a diversionary device was used and that the hostage rescue team entered in a door a